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P0300 Diagnostic Trouble Code Discussion for July 2012

Multiple Misfire Detected


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Trouble Ticket Help Requests for DTC P0300
Help Request Posted
2001 Jeep Grand Cherokee Laredo 4.0L Misfire, MIL Lamp on VIN: 1J4GW48S61
P0300: Multiple Misfire Detected. Good evening, i have a 2001 jeep grand cherokee here with all cylinder misfires, and running hot, we first saw this vehicle for a misfire code on #3 cylinder with engine light on. We replaced the coil pack due to a crack and replaced plugs, a month later it ca...
July 03, 2012
2001 Buick Park Avenue Ultra 3.8L Misfire VIN: 1G4CU54131
P0300: Multiple Engine Misfire Detected. Came in running bad found cyl number five not firing. Had spark so pulled plug and was flat. Something smashed gap closed. Reopened and road tested and will not do it again. Not sure what could intermitently close the gap on spark plug? when hard accelerating ...
July 05, 2012
2005 Cadillac DeVille 4.6L Misfire VIN: 1G6KD54Y15
P0300: Engine Misfire Detected. ... help, I have a 2005 Cadillac Deville that after it sets for awhile it will misfire when you first start it then clear right up and run fine, it has a p0300 in memory, and misfire counters show # 1 and # 2 cylinders having misfires, but mainly # 1 and I thi...
July 05, 2012
2001 Jeep Grand Cherokee Laredo 4.0L Misfire, MIL Lamp on VIN: 1J4GW48S61
P0300: Multiple Cylinder Misfire Detected. Good evening, i have a 2001 jeep grand cherokee here with all cylinder misfires, and running hot, we first saw this vehicle for a misfire code on #3 cylinder with engine light on. We replaced the coil pack due to a crack and replaced plugs, a month later it ca...
July 05, 2012
2005 Dodge Ram 1500 Truck ST 5.7L Stall, Misfire VIN: 1D3HU18D35
P0300: Multiple Misfire Detected. This 5.7 dodge has a misfire most felt when coming to a hard stop. It is bad enough to stall at times. Starts right back up and runs fine. Misfire will hapen slighty from time to time on throtle tip in and on cold starts for the first 10 seconds then clears up...
July 09, 2012
2006 GMC Savana 3500 6.0L No power, runs poor VIN: 1GJHG39U36
P0300: Multiple Cylinder Misfire Detected. After vehicle gets hot on long trip, when you pull of and idle when you start to accel, has no power, feels like it is running on 4 cyls and ac quits blowing cold air, turn off and wait a few minutes and all is fine
July 10, 2012
2003 Jeep Grand Cherokee Laredo 4.0L Misfire, MIL Lamp on VIN: 1J4GW48S83
P0300: Multiple Misfire Detected. hey all, I have had this jeep in my bay for the last week or so. It has random misfires on most if not all of the holes. At an idle and around town it dosnt run bad at all. If the motor runs above 2500 rpm it will start counting misfires on all the holes.(mor...
July 10, 2012
2005 Honda Odyssey EX 3.5L Misfire, MIL Lamp on VIN: 5FNRL38795
P0300: Random Misfire Detected. Vehicle will misfire intermittantly for about 30 seconds. Will not misfire the rest of the day. Might go severl days without misfiring. When it misfires it will set two or three misfire codes. The next time two or three other misfire codes. Eventually all p030...
July 11, 2012
2000 Cadillac DeVille DHS 4.6L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1G6KE57Y5Y
P0300: Engine Misfire Detected. Hello all Just got done doing head gaskets and timeserts started vehicle and noticed right away that it had a misfire at idle and the MLS light was on. Increased rpm to around 1800 and noticed engine smoothed out. Checked for a misfire with the scanner, code p...
July 12, 2012
2005 Dodge Ram 1500 Truck ST 5.7L Stall, Misfire VIN: 1D3HU18D35
P0300: Multiple Misfire Detected. This 5.7 dodge has a misfire most felt when coming to a hard stop. It is bad enough to stall at times. Starts right back up and runs fine. Misfire will hapen slighty from time to time on throtle tip in and on cold starts for the first 10 seconds then clears up...
July 12, 2012
2003 GMC Savana 2500 5.3L Misfire VIN: 1GTFG29TX3
P0300: Multiple Cylinder Misfire Detected. ... issue. It is now back P0300. All cylinders are misfiring. Fuel trin 120 to 132 both banks at idle. Miss at lower rpms only. Fuel pressure 57psi KOEO. Engine runs great cold. Do these plastic manifolds crak on or warp and leak? When we had it off before we ...
July 12, 2012
2000 Cadillac DeVille DHS 4.6L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1G6KE57Y5Y
P0300: Engine Misfire Detected. Hello all Just got done doing head gaskets and timeserts started vehicle and noticed right away that it had a misfire at idle and the MLS light was on. Increased rpm to around 1800 and noticed engine smoothed out. Checked for a misfire with the scanner, code p...
July 13, 2012
2003 Oldsmobile Alero GL 2.2L Poor Idle Quality, Hesitation, Cuts out, Stall, MIL Lamp on VIN: 1G3NL52F23
P0300: Multiple Cylinder Misfire Detected. Customer went to visit his daughter in hospital,car was running fine.after visiting with her the car was running like crap!could barely get it to my shop the next day.the exhaust was making a weird popping noise at the tailpipe.he said the check engine light n...
July 17, 2012
1996 Chevrolet Impala SS 5.7L No Start, Stall VIN: 1G1BL52P9T
P0300: Multiple Engine Misfire Detected. Fuel pressure at service port on rail is 20 psi.Fuel pressure on feed line(which is the bigger line) is 20 psi.When I disconnect line to test pressure fuel shoots out like a fire hose.Someone told me of a forum online that the pump wiring in fuel pump kit is b...
July 18, 2012
2009 Chevrolet Colorado WT 3.7L Poor Idle Quality, Hesitation, Misfire, MIL Lamp on VIN: 1GCCS19E69
P0300: Cylinder Misfire. Scanned for codes and found p0300 randome cylinder misfie and after looking at misfire monitors found cylinder one was the issue,installed new spark plug, no change, switched coil with a good one, no change,have powers and ground,have injector pulse, fuel pres...
July 18, 2012
2001 Mitsubishi Galant ES 2.4L Misfire VIN: 4A3AA46G71
P0300: Random Misfire Detected. Looking for some advice on this galant... Seems to run great until fully warm then it develops a misfire most of the time just random but occasionally hit sets a po304. Its a pretty harsh miss at idle or just sitting in drive. Ive swapped injectors from cylind...
July 18, 2012
2007 Nissan Quest SL 3.5L Poor Idle Quality, Misfire, MIL Lamp on VIN: 5N1BV28U87
P0300: Multiple Misfire Detected. Hello Fellow Techs ! This Quest is driving me crazy ! I thought i nailed the problem when i replaced ground cable and two visually blistered coils ( cyl 1 & 3) . Vehicle is missfiring with same po300. I hooked up labscope and i get nice pattern , Ecm seems...
July 18, 2012
2001 Mitsubishi Galant ES 2.4L Misfire VIN: 4A3AA46G71
P0300: Random Misfire Detected. Looking for some advice on this galant... Seems to run great until fully warm then it develops a misfire most of the time just random but occasionally hit sets a po304. Its a pretty harsh miss at idle or just sitting in drive. Ive swapped injectors from cylind...
July 19, 2012
2007 Ford Expedition XLT 5.4L Misfire VIN: 1FMFU15547
P0300: Erased by owner hasnt reset. This Expedition is driving me nuts. It came in with "trying to die at idle" and the owner wanted new plugs and boots. I installed the plugs and find out that the problem is random misfires at idle. The car had a PO300 but it was erased before I got it....
July 20, 2012
1996 Dodge Dakota 3.9L Misfire VIN: 1B7GL23X3T
P0300: Multiple Cylinder Misfire Detected. You can watch on the scan tool misfire counts on all cylinders, When it does set codes they are 300, 301 and 305, swapped injectors from bank to bank no difference, ignition system looks good on scope, Tested backpressure under 2 psi, Checked slack in timing c...
July 25, 2012
2004 Dodge Ram 1500 Truck ST 5.7L Misfire VIN: 1D7HU18D54
P0300: Multiple Misfire Detected. ... randomly spit out a missfire code p0300. When it happens the engine will buck and fart and nearly stall. When the throtle is depressed there is no power. There is no CONSTANT to the time when it happens. The first time it came in I had p0300. I cleaned the...
July 25, 2012
2003 Suzuki Aerio GS 2.0L No Start, Misfire VIN: JS2RB41S13
P0300: Multiple Cylinder Misfire Detected. ... bucks every now and then when driving and is hard starting when warm. Code P0300 and P0727 for randon misfires and engine speed input signal. I assume the input code is for the crank sensor but of course this problem is inter...
July 25, 2012
1998 Chrysler Sebring JXi 2.5L Stall VIN: JC3EL5SH3W
P0300: Multiple Cylinder Misfire Detected. I realize there is several threads in the past regarding this engine and its running issues, especially with the distributor. This one you can start up first thing in the morning, starts fine and will run fine for a minute or so. At a stop sign when you go to ...
July 26, 2012
2001 Isuzu Rodeo LS 3.2L MIL Lamp on VIN: 4S2CK58W11
P0300: Multiple Cylinder Misfire Detected. replaced spark plugs with denso platinium and also with ngk iridium and no chance, checked the no. 6 coil for proper cylinder position.no vacuum leaks,no exhaust restriction,good fuel pressure
July 26, 2012
2004 Audi Allroad Quattro 4.2L Poor Idle Quality, Misfire, MIL Lamp on VIN: WA1YL64BX4
P0300: Random/Multiple Misfire. Got this one Audi that has a dead misfire on Cylinder 1 and Misfires on cylinder 2 on cold start. Checked compression, 185-190 psi across the board. Ran fuel system cleaner through. Swapped plugs, coils, injectors, does not change cylinder. Checked for injecto...
July 27, 2012
2002 BMW X5 3.0i 3.0L No Start, Poor Idle Quality VIN: 5UXFA53532
P0300: Random multiple misfire. I have a question about fuel transfer in the fuel tank of this X5 3.0. It came in as a vehicle that either ran really bad or did not start at all, depending on its mood that day. The air boot was torn, so we replaced it. The car actually ran worse after that. ...
July 27, 2012
1998 Chrysler Sebring JXi 2.5L Stall VIN: JC3EL5SH3W
P0300: Multiple Cylinder Misfire Detected. I realize there is several threads in the past regarding this engine and its running issues, especially with the distributor. This one you can start up first thing in the morning, starts fine and will run fine for a minute or so. At a stop sign when you go to ...
July 27, 2012
2000 GMC Safari SL 4.3L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GKEL19W5Y
P0300: Multiple Cylinder Misfire Detected. I have a 00 Safari running very rough at idle. Shows misfires on # 1 and 4, mostly on # 4. Fuel trim Bank1 st -7,lt -3 Bank 2 st -30 lt -3 at idle. Fuel pressure 62 at wot, it isnt dropping when shut off. Did injector flow test and all were even drops. 02 stay...
July 29, 2012
2000 Toyota Corolla VE 1.8L Hesitation, Misfire, MIL Lamp on VIN: 2T1BR12E9Y
P0300: Multiple Cylinder Misfire Detected. ... hesitation problem. will run for 1/2 hour fine and then go to take off ( esp. making a left turn) and it will not go for 10-15 seconds ( doesn't die altogether but won't rev over 1200 rpm. has had intermittent P0171 code on and off over the past 3 years bu...
July 30, 2012
2005 Hyundai Sonata GLS 2.7L Misfire, MIL Lamp on VIN: KMHWF35H95
P0300: Multiple Misfire Detected. ... the plugs and wires and did a motorvac service. Since then it has been back with a 2 and 5 cylinder misfire. We replaced the 2/5 coil and sent it back out. Now it is back with a p0305, p0302, and a p0300. At one time we c...
July 31, 2012
2001 Jeep Grand Cherokee Laredo 4.0L Misfire, MIL Lamp on VIN: 1J4GW48S61
P0300: Multiple Cylinder Misfire Detected. Good evening, i have a 2001 jeep grand cherokee here with all cylinder misfires, and running hot, we first saw this vehicle for a misfire code on #3 cylinder with engine light on. We replaced the coil pack due to a crack and replaced plugs, a month later it ca...
July 03, 2012
2001 Buick Park Avenue Ultra 3.8L Misfire VIN: 1G4CU54131
P0300: Multiple Engine Misfire Detected. Came in running bad found cyl number five not firing. Had spark so pulled plug and was flat. Something smashed gap closed. Reopened and road tested and will not do it again. Not sure what could intermitently close the gap on spark plug? when hard accelerating ...
July 05, 2012
2005 Cadillac DeVille 4.6L Misfire VIN: 1G6KD54Y15
P0300: Engine Misfire Detected. ... help, I have a 2005 Cadillac Deville that after it sets for awhile it will misfire when you first start it then clear right up and run fine, it has a p0300 in memory, and misfire counters show # 1 and # 2 cylinders having misfires, but mainly # 1 and I thi...
July 05, 2012
2001 Jeep Grand Cherokee Laredo 4.0L Misfire, MIL Lamp on VIN: 1J4GW48S61
P0300: Multiple Cylinder Misfire Detected. Good evening, i have a 2001 jeep grand cherokee here with all cylinder misfires, and running hot, we first saw this vehicle for a misfire code on #3 cylinder with engine light on. We replaced the coil pack due to a crack and replaced plugs, a month later it ca...
July 05, 2012
2005 Dodge Ram 1500 Truck ST 5.7L Stall, Misfire VIN: 1D3HU18D35
P0300: Multiple Misfire Detected. This 5.7 dodge has a misfire most felt when coming to a hard stop. It is bad enough to stall at times. Starts right back up and runs fine. Misfire will hapen slighty from time to time on throtle tip in and on cold starts for the first 10 seconds then clears up...
July 09, 2012
2006 GMC Savana 3500 6.0L No power, runs poor VIN: 1GJHG39U36
P0300: Multiple Cylinder Misfire Detected. After vehicle gets hot on long trip, when you pull of and idle when you start to accel, has no power, feels like it is running on 4 cyls and ac quits blowing cold air, turn off and wait a few minutes and all is fine
July 10, 2012
2003 Jeep Grand Cherokee Laredo 4.0L Misfire, MIL Lamp on VIN: 1J4GW48S83
P0300: Multiple Misfire Detected. hey all, I have had this jeep in my bay for the last week or so. It has random misfires on most if not all of the holes. At an idle and around town it dosnt run bad at all. If the motor runs above 2500 rpm it will start counting misfires on all the holes.(mor...
July 10, 2012
2005 Honda Odyssey EX 3.5L Misfire, MIL Lamp on VIN: 5FNRL38795
P0300: Random Misfire Detected. Vehicle will misfire intermittantly for about 30 seconds. Will not misfire the rest of the day. Might go severl days without misfiring. When it misfires it will set two or three misfire codes. The next time two or three other misfire codes. Eventually all p030...
July 11, 2012
2000 Cadillac DeVille DHS 4.6L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1G6KE57Y5Y
P0300: Engine Misfire Detected. Hello all Just got done doing head gaskets and timeserts started vehicle and noticed right away that it had a misfire at idle and the MLS light was on. Increased rpm to around 1800 and noticed engine smoothed out. Checked for a misfire with the scanner, code p...
July 12, 2012
2005 Dodge Ram 1500 Truck ST 5.7L Stall, Misfire VIN: 1D3HU18D35
P0300: Multiple Misfire Detected. This 5.7 dodge has a misfire most felt when coming to a hard stop. It is bad enough to stall at times. Starts right back up and runs fine. Misfire will hapen slighty from time to time on throtle tip in and on cold starts for the first 10 seconds then clears up...
July 12, 2012
2003 GMC Savana 2500 5.3L Misfire VIN: 1GTFG29TX3
P0300: Multiple Cylinder Misfire Detected. ... issue. It is now back P0300. All cylinders are misfiring. Fuel trin 120 to 132 both banks at idle. Miss at lower rpms only. Fuel pressure 57psi KOEO. Engine runs great cold. Do these plastic manifolds crak on or warp and leak? When we had it off before we ...
July 12, 2012
2000 Cadillac DeVille DHS 4.6L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1G6KE57Y5Y
P0300: Engine Misfire Detected. Hello all Just got done doing head gaskets and timeserts started vehicle and noticed right away that it had a misfire at idle and the MLS light was on. Increased rpm to around 1800 and noticed engine smoothed out. Checked for a misfire with the scanner, code p...
July 13, 2012
2003 Oldsmobile Alero GL 2.2L Poor Idle Quality, Hesitation, Cuts out, Stall, MIL Lamp on VIN: 1G3NL52F23
P0300: Multiple Cylinder Misfire Detected. Customer went to visit his daughter in hospital,car was running fine.after visiting with her the car was running like crap!could barely get it to my shop the next day.the exhaust was making a weird popping noise at the tailpipe.he said the check engine light n...
July 17, 2012
1996 Chevrolet Impala SS 5.7L No Start, Stall VIN: 1G1BL52P9T
P0300: Multiple Engine Misfire Detected. Fuel pressure at service port on rail is 20 psi.Fuel pressure on feed line(which is the bigger line) is 20 psi.When I disconnect line to test pressure fuel shoots out like a fire hose.Someone told me of a forum online that the pump wiring in fuel pump kit is b...
July 18, 2012
2009 Chevrolet Colorado WT 3.7L Poor Idle Quality, Hesitation, Misfire, MIL Lamp on VIN: 1GCCS19E69
P0300: Cylinder Misfire. Scanned for codes and found p0300 randome cylinder misfie and after looking at misfire monitors found cylinder one was the issue,installed new spark plug, no change, switched coil with a good one, no change,have powers and ground,have injector pulse, fuel pres...
July 18, 2012
2001 Mitsubishi Galant ES 2.4L Misfire VIN: 4A3AA46G71
P0300: Random Misfire Detected. Looking for some advice on this galant... Seems to run great until fully warm then it develops a misfire most of the time just random but occasionally hit sets a po304. Its a pretty harsh miss at idle or just sitting in drive. Ive swapped injectors from cylind...
July 18, 2012
2007 Nissan Quest SL 3.5L Poor Idle Quality, Misfire, MIL Lamp on VIN: 5N1BV28U87
P0300: Multiple Misfire Detected. Hello Fellow Techs ! This Quest is driving me crazy ! I thought i nailed the problem when i replaced ground cable and two visually blistered coils ( cyl 1 & 3) . Vehicle is missfiring with same po300. I hooked up labscope and i get nice pattern , Ecm seems...
July 18, 2012
2001 Mitsubishi Galant ES 2.4L Misfire VIN: 4A3AA46G71
P0300: Random Misfire Detected. Looking for some advice on this galant... Seems to run great until fully warm then it develops a misfire most of the time just random but occasionally hit sets a po304. Its a pretty harsh miss at idle or just sitting in drive. Ive swapped injectors from cylind...
July 19, 2012
2007 Ford Expedition XLT 5.4L Misfire VIN: 1FMFU15547
P0300: Erased by owner hasnt reset. This Expedition is driving me nuts. It came in with "trying to die at idle" and the owner wanted new plugs and boots. I installed the plugs and find out that the problem is random misfires at idle. The car had a PO300 but it was erased before I got it....
July 20, 2012
1996 Dodge Dakota 3.9L Misfire VIN: 1B7GL23X3T
P0300: Multiple Cylinder Misfire Detected. You can watch on the scan tool misfire counts on all cylinders, When it does set codes they are 300, 301 and 305, swapped injectors from bank to bank no difference, ignition system looks good on scope, Tested backpressure under 2 psi, Checked slack in timing c...
July 25, 2012
2004 Dodge Ram 1500 Truck ST 5.7L Misfire VIN: 1D7HU18D54
P0300: Multiple Misfire Detected. ... randomly spit out a missfire code p0300. When it happens the engine will buck and fart and nearly stall. When the throtle is depressed there is no power. There is no CONSTANT to the time when it happens. The first time it came in I had p0300. I cleaned the...
July 25, 2012
2003 Suzuki Aerio GS 2.0L No Start, Misfire VIN: JS2RB41S13
P0300: Multiple Cylinder Misfire Detected. ... customer complains the vehicle bucks every now and then when driving and is hard starting when warm. Code P0300 and P0727 for randon misfires and engine speed input signal. I assume the input code is for the crank sensor but of course this problem is inter...
July 25, 2012
1998 Chrysler Sebring JXi 2.5L Stall VIN: JC3EL5SH3W
P0300: Multiple Cylinder Misfire Detected. I realize there is several threads in the past regarding this engine and its running issues, especially with the distributor. This one you can start up first thing in the morning, starts fine and will run fine for a minute or so. At a stop sign when you go to ...
July 26, 2012
2001 Isuzu Rodeo LS 3.2L MIL Lamp on VIN: 4S2CK58W11
P0300: Multiple Cylinder Misfire Detected. replaced spark plugs with denso platinium and also with ngk iridium and no chance, checked the no. 6 coil for proper cylinder position.no vacuum leaks,no exhaust restriction,good fuel pressure
July 26, 2012
2004 Audi Allroad Quattro 4.2L Poor Idle Quality, Misfire, MIL Lamp on VIN: WA1YL64BX4
P0300: Random/Multiple Misfire. Got this one Audi that has a dead misfire on Cylinder 1 and Misfires on cylinder 2 on cold start. Checked compression, 185-190 psi across the board. Ran fuel system cleaner through. Swapped plugs, coils, injectors, does not change cylinder. Checked for injecto...
July 27, 2012
2002 BMW X5 3.0i 3.0L No Start, Poor Idle Quality VIN: 5UXFA53532
P0300: Random multiple misfire. I have a question about fuel transfer in the fuel tank of this X5 3.0. It came in as a vehicle that either ran really bad or did not start at all, depending on its mood that day. The air boot was torn, so we replaced it. The car actually ran worse after that. ...
July 27, 2012
1998 Chrysler Sebring JXi 2.5L Stall VIN: JC3EL5SH3W
P0300: Multiple Cylinder Misfire Detected. I realize there is several threads in the past regarding this engine and its running issues, especially with the distributor. This one you can start up first thing in the morning, starts fine and will run fine for a minute or so. At a stop sign when you go to ...
July 27, 2012
2000 GMC Safari SL 4.3L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GKEL19W5Y
P0300: Multiple Cylinder Misfire Detected. I have a 00 Safari running very rough at idle. Shows misfires on # 1 and 4, mostly on # 4. Fuel trim Bank1 st -7,lt -3 Bank 2 st -30 lt -3 at idle. Fuel pressure 62 at wot, it isnt dropping when shut off. Did injector flow test and all were even drops. 02 stay...
July 29, 2012
2000 Toyota Corolla VE 1.8L Hesitation, Misfire, MIL Lamp on VIN: 2T1BR12E9Y
P0300: Multiple Cylinder Misfire Detected. This car has an intermittent serious hesitation problem. will run for 1/2 hour fine and then go to take off ( esp. making a left turn) and it will not go for 10-15 seconds ( doesn't die altogether but won't rev over 1200 rpm. has had intermittent P0171 code on...
July 30, 2012
2005 Hyundai Sonata GLS 2.7L Misfire, MIL Lamp on VIN: KMHWF35H95
P0300: Multiple Misfire Detected. ... the plugs and wires and did a motorvac service. Since then it has been back with a 2 and 5 cylinder misfire. We replaced the 2/5 coil and sent it back out. Now it is back with a p0305, p0302, and a p0300. At one time we c...
July 31, 2012